ascii model format ???

right now im working on my own graphics engine. I have descided to make my own 3d model format. now i hear alot of people talking about ascii 3d models. What is the difference from ascii models and non ascii models? sorry for such basic question.

The difference is that ascii models are easier to load in your program if you do not understand binary files. However the bigger the object the larger the file. Binary files are somewhat smaller than ascii files are somewhat slower to read. Many binary files also contain information about animations and texturing. I havent ever seen an ascii format that has animation. by the way. maya’s obj format is a good ascii format if you are looking for an example. and 3ds is a good binary.